标题： 暗尖倾斜传感 显示英文标题

标题： Dark tip-tilt sensing

摘要： 暗波前传感以其最简单和粗糙的形式是一种四单元探测器，其中心有一个圆形的暗墨水斑点作为遮挡盘。 这种传感器在闭环条件下，只要遮挡盘的尺寸略小于光斑且小于残余抖动运动，其极限星等就会比常规四单元探测器更暗。 我们展示了针对使用自然导星提供倾斜信号的通用自适应光学系统的模拟。 我们考虑了包括超过暗盘尺寸的振幅在内的残余校正抖动频谱。 显示英文摘要

摘要： Dark wavefront sensing in its simplest and more crude form is a quad-cell with a round spot of dark ink acting as occulting disk at the center. This sensor exhibits fainter limiting magnitude than a conventional quad-cell, providing that the size of the occulting disk is slightly smaller than the size of the spot and smaller than the residual jitter movement in closed loop. We present simulations focusing a generic Adaptive Optics system using Natural Guide Stars to provide the tip-tilt signal. We consider a jitter spectrum of the residual correction including amplitudes exceeding the dark disk size.